diff -r 000000000000 -r 6474c204b198 browser/extensions/pdfjs/content/PdfJsTelemetry.jsm
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/extensions/pdfjs/content/PdfJsTelemetry.jsm	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,59 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Copyright 2013 Mozilla Foundation
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/* jshint esnext:true */
+
+'use strict';
+
+this.EXPORTED_SYMBOLS = ['PdfJsTelemetry'];
+
+const Cu = Components.utils;
+Cu.import('resource://gre/modules/Services.jsm');
+
+this.PdfJsTelemetry = {
+  onViewerIsUsed: function () {
+    let histogram = Services.telemetry.getHistogramById("PDF_VIEWER_USED");
+    histogram.add(true);
+  },
+  onFallback: function () {
+    let histogram = Services.telemetry.getHistogramById("PDF_VIEWER_FALLBACK_SHOWN");
+    histogram.add(true);
+  },
+  onDocumentSize: function (size) {
+    let histogram = Services.telemetry.getHistogramById("PDF_VIEWER_DOCUMENT_SIZE_KB");
+    histogram.add(size / 1024);
+  },
+  onDocumentVersion: function (versionId) {
+    let histogram = Services.telemetry.getHistogramById("PDF_VIEWER_DOCUMENT_VERSION");
+    histogram.add(versionId);
+  },
+  onDocumentGenerator: function (generatorId) {
+    let histogram = Services.telemetry.getHistogramById("PDF_VIEWER_DOCUMENT_GENERATOR");
+    histogram.add(generatorId);
+  },
+  onForm: function (isAcroform) {
+    let histogram = Services.telemetry.getHistogramById("PDF_VIEWER_FORM");
+    histogram.add(isAcroform);
+  },
+  onStreamType: function (streamTypeId) {
+    let histogram = Services.telemetry.getHistogramById("PDF_VIEWER_STREAM_TYPES");
+    histogram.add(streamTypeId);
+  },
+  onTimeToView: function (ms) {
+    let histogram = Services.telemetry.getHistogramById("PDF_VIEWER_TIME_TO_VIEW_MS");
+    histogram.add(ms);
+  }
+};